Geo-redundant storage with an extra read-only endpoint in the secondary region that can be read from without a failover.
Also called read-access geo-redundant storage.
Read more: Microsoft Learn
In the Ultra Transcenders books
AZ-305AZ-104AZ-700AZ-900DP-900
Each book explains RA-GRS in context, with comparison tables and the common traps.
Terms in this definition
- GRS
Geo-redundant storage keeps six copies in total: three locally redundant in the primary region and three in the paired region. The secondary copy can be read only once a failover has happened.
- Secondary region
Holds disaster-recovery copies of data or workloads, typically hundreds of miles away from the primary location. Geo-redundant storage always uses the primary's pair for this, with no option to change it.
- CRUD
Shorthand for create, read, update and delete, the four basic things you do with data. Data-plane roles in Azure Cosmos DB, for instance, authorise those operations on items.